Idaho Dams
395 dams tracked by the National Inventory of Dams
Total Dams
395
High Hazard
97
24.6%
Poor / Unsatisfactory
42
Average Age
76 yrs
Hazard Classification
High97 (24.6%)
Significant141 (35.7%)
Low156 (39.5%)
Condition Assessment
Satisfactory76 (19.2%)
Fair248 (62.8%)
Poor / Unsatisfactory42 (10.6%)
Not Rated29 (7.3%)
Federal
33
State
14
Local
18
Private
325
Tallest Dams
- Thompson Mtis789 ft
- Dworshak Dam717 ft
- Anderson Ranch Dam456 ft
- Arrowrock Dam350 ft
- Lucky Peak Dam340 ft
High Hazard Dams
- Thompson MtisHigh
- Dworshak DamHigh
- Anderson Ranch DamHigh
- Arrowrock DamHigh
- Lucky Peak DamHigh
Poor Condition Dams
- Magic DamUnsatisfactory
- Fish CreekPoor
- OrchardPoor
- Saint JohnUnsatisfactory
- Louisa CreekPoor
All Dams in Idaho
Showing 201–225 of 395
| Dam Name | Height (ft) | Year | Hazard | Condition |
|---|---|---|---|---|
| Lamb-Weston Power County | 20 | 1974 | Low | Fair |
| Lamont Franklin County | 68 | 1948 | High | Fair |
| Land Washington County | 15 | 1976 | Low | Fair |
| Lehman Creek Lower Custer County | 21 | 1999 | Low | Poor |
| Lehman Creek Upper Custer County | 22 | 1925 | Low | Poor |
| Little Blue Creek Owyhee County | 37 | 1914 | Significant | Poor |
| Little Camas Elmore County | 55 | 1912 | Significant | Fair |
| Little Canyon Elmore County | 30 | 1919 | Significant | Fair |
| Little Crane Creek Washington County | 33 | 1908 | Low | Satisfactory |
| Little (North Crane Creek Dam) Washington County | 28 | 1895 | Significant | Fair |
| Little Payette Lake Dike Valley County | 11 | 1926 | Significant | Poor |
| Little Payette Lake Main Valley County | 25 | 1926 | High | Fair |
| Little (Upper Bissel Creek Dam) Gem County | 37 | 1963 | Significant | Fair |
| Little Valley Bonneville County | 23 | 1897 | Low | Fair |
| Little Wood River Dam Blaine County | 129 | 1939 | High | Not Available |
| Lodge Pond Payette County | 15 | 1910 | Significant | Fair |
| Lone Tree Owyhee County | 12 | 1918 | Low | Fair |
| Long Tom Elmore County | 60 | 1906 | Significant | Fair |
| Lost Valley Adams County | 31 | 1910 | High | Poor |
| Louie Lake Valley County | 18 | 1928 | Low | Fair |
| Louisa Creek Owyhee County | 41 | 1931 | Low | Poor |
| Lower Diversion Bonneville County | 14 | 1982 | Low | Satisfactory |
| Lower Salmon Gooding County | 110 | 1949 | High | Satisfactory |
| Lucky Friday No 3 Shoshone County | 102 | 1979 | Significant | Fair |
| Lucky Friday No 4 Shoshone County | 132 | 2010 | High | Satisfactory |
Data sourced from the National Inventory of Dams (NID). Hazard classification reflects potential consequences of failure, not the likelihood of failure.